A = readmatrix ('NiI2_10VCOOL_20x_680nm_switch_P_30K.txt')

x = A(11:60,1)-10
y = A(11:60,2)*1e12

hold on
plot(x,y,LineWidth=1,Color=[0 0 0])
xlim([0,40])
xticks(0:10:40)
yticks([1:0.1:1.2])
set(gca,'XMinorTick','on','YMinorTick','on')
set(gca,'box','on','Xcolor',[0 0 0],'Ycolor',[0 0 0])
hold off
box on
set(gcf,'Position',[0, 0, 200, 200])